In "The Rings of Akhaten," Clara (Jenna-Louise Coleman) and the Doctor (Matt Smith) take their first proper TARDIS trip together, to the inhabited rings of the planet Akhaten where the Festival of Offerings is in full swing. The latest "Doctor Who" episode premieres at 7 p.m. CT April 6 on BBC America as part of Supernatural Saturday and is followed by new episodes of "Orphan Black" and "The Nerdist." Curt Wagner, RedEye's Show Patrol